If you are certain it's stopped, have you tried rebooting to see if the update was successful, or trying the update again if it was not? You have no other options.
if you did the update in windows a lot of mb bios brick this way. intel does have a recovery bios file that you need to put on a usb stick and boot the pc up. it may take 20-30 min for the mb to recover. https://downloadcenter.intel.com/download/23393/?product=54876